package com.atguigu.gulimall.product.config;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration
@EnableTransactionManagement
@MapperScan("com.atguigu.gulimall.product.dao")
public class MybatisConfig {
  /**

    * 注册mybatis plus的分页插件

    * @return

    */

    @Bean

    public PaginationInterceptor paginationInterceptor() {

        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();

        // 开启 count 的 join 优化,只针对部分 left join

        paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));

        // 设置最大单页限制数量，默认 500 条，-1 不受限制

        paginationInterceptor.setLimit(500);

        return paginationInterceptor;

    }

}
